[Bug other/31754] Include column number along line in error messages main.cpp:5:38

["dseketel at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #2 from dseketel at redhat dot com  2008-06-16 11:13 -------
Created an attachment (id=15774)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15774&action=view)
produce more accurate column information in error messages

This patch modifies the c++ parser to produce more accurate column information
in error messages.

The basic idea of the patch is to not use the global input_location variable to
generate line/columns info in error messages, but rather to pass the right
token location to each error message.

For now, I have mostly touched only the parsing code. Semantic analysis code
has not been touched yet. I have not touched warning generation code either.

I have started to make the error tests in testsuite/g++.dg/parse/ be column
aware by forcing the -fshow-column flag on these tests as well. It is looking
good so far. I realised that -fno-show-column was forced in
gcc/testsuite/lib/g++.exp. So I commented that so that -fshow-column flag can
take effect when triggered.

This patch is work in progress and I will update it here until it becomes solid
enought to be posted to the gcc-patches mailing list.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31754